I think we'd all agree that what we need is a more responsible vet presence to balance out young mistakes... trading Matheson for that makes perfect sense.
Sadly after looking around the league I see no trade/player that realistically makes sense for both sides.
Every team with possibly a free body already has a solid pp dman or the the guy coming back is too bad offensively or too good overall to make it a good trade. Plus there's always cap shit too.
Likely too difficult to do that kind of identity shifting trade in season.